Nordic Org-Number to VAT Number Converter
Get a momsregistreringsnummer från organisationsnummer - or a Danish momsnummer from a CVR number, or a Norwegian MVA number from an organisasjonsnummer. Each country's check digit is verified first, so a typo is caught before it turns into a wrong VAT number, and every result says plainly where the conversion is a rule and where it is only the usual case.
The whole conversion is arithmetic - check digits and a formatting rule - and it runs entirely in your browser. No organisation number is sent anywhere.
Nothing to convert yet
Where each rule comes from
- Skatteverket - Kontrollera momsregistreringsnummer (VAT-nummer)Skatteverket's own page on VAT number format and checking numbers against VIES.
- Bokio - MomsregistreringsnummerSE + the ten digits of the organisationsnummer + 01, written without hyphens or spaces. For an enskild firma the personnummer is used, with the century dropped: 19850101-9999 becomes SE850101999901.
- Organisationsnummer - Wikipedia (sv)Ten digits with a Luhn check digit; digits 3-4 are always 20 or higher, which is what separates an organisationsnummer from a personnummer. Also the gruppnummer table for the leading digit.
- Nordflow - Hvad er et SE-nummer?For most Danish companies the CVR number doubles as the SE-nummer, so the VAT number is DK plus the CVR number - but a fællesregistrering or delregistrering breaks that 1:1 relationship.
- Business::DK::CVR - CVR check digit specificationThe Danish CVR mod-11 algorithm: weights 2 7 6 5 4 3 2 1, weighted sum must be divisible by 11.
- Vatstack - Norway VAT number validationThe MVA number is the nine-digit organisasjonsnummer plus the MVA suffix, held only once the entity is in Merverdiavgiftsregisteret. Norway is not in the EU, so MVA numbers are not in VIES.
- Brønnøysundregistrene - EnhetsregisteretThe Norwegian register itself, including whether an entity is registered in Merverdiavgiftsregisteret.
The three rules, side by side
| Country | Org number | Rule | Example |
|---|---|---|---|
| Sweden | 10 digits, Luhn check digit | SE + the ten digits + 01, no hyphens or spaces | 556012-5790 → SE556012579001 |
| Denmark | 8 digits, mod-11 (weights 2 7 6 5 4 3 2 1) | DK + the same eight digits - usually, but not always | 22756214 → DK22756214 |
| Norway | 9 digits, mod-11 (weights 3 2 7 6 5 4 3 2) | the nine digits + MVA - and only once VAT-registered. Not an EU VAT number. | 923 609 016 → NO923609016MVA |
Where a “conversion” is not really a conversion
Sweden is the clean case: the rule is a documented formatting rule and it holds. Denmark is clean for the ordinary company, because the CVR number doubles as the SE-nummer - but a group can share one SE-nummer across several CVR numbers, or split one CVR across several SE-numbers, and then the VAT number in use is not the company's own CVR number at all. Norway is the odd one out entirely: it is outside the EU VAT area, so there is no EU VAT number to convert to, and the MVA suffix only becomes correct once the entity is actually entered in the VAT register. Plenty of Norwegian entities have an organisasjonsnummer and no MVA number whatsoever.
None of the three tells you whether a business is registered for VAT. A well-formed number is a format, not a registration. For Sweden and Denmark you can settle that with the EU VAT number validator, which queries the European Commission's VIES register; for Norway, use Brønnøysundregistrene.
الأسئلة الشائعة
Hur får jag momsregistreringsnummer från organisationsnummer?
Ett svenskt momsregistreringsnummer är SE + organisationsnumrets tio siffror + 01, skrivet utan bindestreck eller mellanslag. Organisationsnumret 556012-5790 ger alltså SE556012579001. Har du en enskild firma är ditt organisationsnummer ditt personnummer, och ett tolvsiffrigt personnummer kortas till tio genom att sekelsiffrorna tas bort: 19850101-9999 blir SE850101999901. Verktyget kontrollerar också kontrollsiffran med Luhn-algoritmen först, så ett feltryck fångas innan det blir ett felaktigt momsnummer.
Why does the Swedish VAT number end in 01?
Because it is a registration sequence number, not something computed from the organisation number. Sweden appends a two-digit sequence to the ten-digit organisationsnummer, and for effectively every business that sequence is 01 - a second, separate VAT registration on the same organisation number would end 02. So the rule is reliable in practice, but it is a convention with a reason rather than a piece of arithmetic, which is why this tool says so rather than presenting it as a formula.
Is a Danish CVR number always the same as the VAT number?
For an ordinary Danish company, yes - the CVR number doubles as the SE-nummer, so the VAT number is simply DK plus those eight digits. It breaks down in group structures. Under a fællesregistrering several companies share a single SE-nummer for VAT even though each has its own CVR number, and under a delregistrering one CVR carries several SE-numbers because business units settle VAT separately. In both cases the VAT number actually used is not the company's own CVR number, so a derived Danish number is worth confirming in VIES before you put it on an invoice.
Can I convert a Norwegian organisasjonsnummer to an EU VAT number?
No, and that is not a limitation of this tool. Norway is not in the EU and sits outside the EU VAT area, so Norwegian businesses have no EU VAT number and do not appear in VIES. What they have is an MVA number: the same nine-digit organisasjonsnummer with MVA after it, written 923 609 016 MVA domestically or NO923609016MVA on international documents. The critical part is that the MVA suffix is only correct once the entity is entered in Merverdiavgiftsregisteret - every MVA number contains an organisasjonsnummer, but many organisasjonsnummer holders are not VAT-registered at all.
How is this different from your EU VAT number validator?
They run in opposite directions. The EU VAT number validator takes a VAT number you already have and answers "is this real?", checking the format and then querying VIES for the trader's name. This tool takes a national organisation number - the number you find in a company register, on a contract or in a supplier record - and works out what the VAT number would be. Use this one to derive the number, then that one to confirm it exists.
Does a valid check digit mean the company is VAT-registered?
No. The check digit only proves the number was typed correctly - it is arithmetic over the digits themselves and knows nothing about any register. A brand-new company, a dormant one, or a business below the VAT threshold all have perfectly valid organisation numbers and no VAT registration. Treat a converted number as "this is what it would be", then verify it against VIES (Sweden, Denmark) or Brønnøysundregistrene (Norway) before relying on it.